Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
  • C01B15/01—Hydrogen peroxide
  • C01B15/037—Stabilisation by additives
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
  • C01B15/04—Metal peroxides or peroxyhydrates thereof; Metal superoxides; Metal ozonides; Peroxyhydrates thereof
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
  • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
  • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
  • C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/28—Phosphorus compounds with one or more P—C bonds
  • C07F9/38—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)]
  • C07F9/3804—Phosphonic acids [RP(=O)(OH)2]; Thiophosphonic acids ; [RP(=X1)(X2H)2(X1, X2 are each independently O, S or Se)] not used, see subgroups
  • C07F9/3808—Acyclic saturated acids which can have further substituents on alkyl
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
  • C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
  • C08K5/5333—Esters of phosphonic acids
  • C08K5/5353—Esters of phosphonic acids containing also nitrogen
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/36—Organic compounds containing phosphorus
  • C11D3/364—Organic compounds containing phosphorus containing nitrogen
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
  • C22B3/385—Thiophosphoric acids, or esters thereof
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
  • C22B3/386—Polyphosphoric oxyacids, or derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
  • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
  • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
  • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
  • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
  • C22B3/387—Cyclic or polycyclic compounds
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D3/00—Electroplating: Baths therefor
  • C25D3/02—Electroplating: Baths therefor from solutions
  • C25D3/48—Electroplating: Baths therefor from solutions of gold
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
  • D06M13/282—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing phosphorus
  • D06M13/288—Phosphonic or phosphonous acids or derivatives thereof
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P10/00—Technologies related to metal processing
  • Y02P10/20—Recycling
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S210/00—Liquid purification or separation
  • Y10S210/902—Materials removed
  • Y10S210/911—Cumulative poison
  • Y10S210/912—Heavy metal
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S210/00—Liquid purification or separation
  • Y10S210/902—Materials removed
  • Y10S210/911—Cumulative poison
  • Y10S210/912—Heavy metal
  • Y10S210/913—Chromium

Definitions

• complexing agents which combine with metal ions in solution to form soluble complexes (which agents are commonly referred to as sequestrants) is of great importance in many industrial processes inasmuch as it may prevent undesired precipitation reactions from occurring.
• sequestration of calcium is important in water treatment and in laundry solutions for controlling hardness of the water.
• Sequestration of the heavy metals such as copper and nickel is essential in such areas as textile processing, metal cleaning and finishing. Not all sequestrants, however, are equally effective, their activity varying with their structures and the conditions under which they are used, for example, the common carboxylic acid sequestrants are often ineffective in preventing ferric ion precipitation from alkaline solutions of pH greater than 8.
• Ethylenediaminetetraacetic acid has been employed in the past for treatment of iron deficiencies of citrus trees under acid conditions.
• the EDTA iron chelates are not stable in neutral and alkaline media.
• sequestrants which may be employed in acid media as wel as alkaline media is significant not only for agricultural applications, but for use in the detergent field, metal cleaning field, textile and dye industry and as stabilizers for organic and inorganic peroxides.
• Flame retardant textiles have been produced by depositing metal oxides, within or on the textile fibers, by the successive precipitation of ferric oxides and a mixture of tungstic acid and stannic oxide or by successive deposition of antimony trioxide and titanium dioxide.
• Such processes require plural treatment baths in which strongly acidic solutions are employed, thus posing the problem of possible textile degradation.
• metal oxide coatings on textile materials create difficulties in subsequent dyeing processes which deleteriously affect the hand of the finished product.
• Other processes involve the use of a single processing bath wherein a dispersion of chlorinated hydrocarbon and finely divided antimony oxide is padded on the textile material.
• antimony oxide will react with hydrogen chloride, generated by degradation of the chlorinated hydrocarbon, to form antimony oxychloride which acts to suppress flame.
• This combination of a chlorinated hydrocarbon and finely divided antimony oxide are not acceptable finishes for closely woven textiles as they deleteriously affect the hand of the finished product.
• a further process for imparting flame resistance to cellulosic materials is by the esterification of the cellulose with diammonium hydrogen ortho-phosphate. Textile products so treated, however, are subjected to metathesis reaction with cations during washing, and must be regenerated by reacting the wash product with an ammonium chloride solution.
• thermoplastic resin compositions which are flame retardant is of considerable commercial importance.
• articles as castings, moldings, foamed or laminated structures and the like are required, or are at least desired, to be resistant to fire and flame and to possess the ability to endure heat without deterioration.
• the use of various materials incorporated into thermoplastic resins so as to improve the flame retardancy thereof has been known.
• Many compounds have been commercially available for such use, among them being chlorostyrene copolymers, chlorinated paraffin wax in admixture with triphenyl styrene, chlorinated paraffins and aliphatic antimonical compounds, as well as antimony oxide-chlorinated hydrocarbon mixtures.
• a problem associated with these compounds has been, however, the fact that generally a large amount, i.e., upwards to 35% of additive, must be incorporated into the resin in order to make it sufficiently flame retardant. Such large amounts of additive may deleteriously affect the physical characteristics of the thermoplastic resin, as well as substantially complicating and increasing the cost of preparation thereof.
• a further problem is that these prior art additives tend to crystallize or oil out of the resin after a relatively short time of incorporation.
• the present invention relates to a group of compounds which may be added to thermoplastic resins in relatively small amounts and still produce satisfactory flame retardant compositions which will not crystallize nor oil out of the resin after incorporation therein.
• Another object is to provide a method for treating normally flammable cellulosic, proteinaceous or analogous man-made materials to render them flame retardant. Another object is to produce a flame retardant additive which chemically combines with the material being treated. Another object is to provide flame retarding thermoplastic resin compositions comprising normally flammable thermoplastic resin materials. A further object is to provide a process for treating normally flammable thermoplastic resin compositions to render them flame retardant. A particular object is to devise a composition comprising normally flammable cellulosic, proteinaceous or analogous man-made materials and an effective flame retardant amount of the compound represented by the formula: ##STR4## wherein R and R' are as above described.
• an object of this invention is to provide an additive useful in improving the electrodeposition of precious metals in electrochemical deposition process.
• the instant invention relates to compounds of the formula: ##STR5## wherein R' is selected from the group consisting of -OH , alkoxy, preferably of 1-6 carbon atoms, and aryloxy, and R is selected from the group consisting of: ##STR6## wherein Z is selected from the group consisting of -OH , alkyl and alkoxy, preferably of 1-6 carbon atoms, aryl and aryloxy, and their use as metal ion sequestrants and flame retardant additives.
• Illustrative examples of compounds of the present invention include, for instance, compounds of the structure: ##SPC1##
• Temperatures are generally from about 50° C to about 160° C. Preferably, the reaction is continued from about 3 to about 6 hours at a temperature of about 80° C to about 120° C.
• the solvent or other volatile matter is, thereafter, stripped or otherwise removed from the product. Suitable solvents include benzene, toluene, xylene, glymes, N-N-dimethyl formamide, and aliphatics or aromatic hydrocarbons.
• the corresponding N-hydroxy methyl amide, N-hydroxy methyl sulfonamide and methylolated urea starting materials may be reacted with a phosphorus trihalide by the method of U.S. Pat. No. 2,304,156 to form the dihalogenated, phosphonate or diphosphonate intermediate.
• the dialkyl phosphonate or dihalogenated phosphonate intermediate may then be selectively hydrolyzed to provide the final compounds.
• Typical compounds suitable as reactants herein include: ##SPC2##
• the metal ions which may be sequestered by the composition of this invention are those cations having a valence of two or more, such as the ions of calcium, chromium, copper, nickel, tin, aluminum, cobalt, platinum, palladium, rhodium, iridium, ruthenium, osmium, zirconium, hafnium, the rare earths such as gadolinium, europium, neodymium, the actinides such as uranium, and iron.
• the compounds of this invention when added to those solutions in which sequestration is desired, may be added as a solid or as a solution. If it is desired to add said compounds as a solution, the compound may be dissolved in water. From about 0.001 percent to about 50 percent concentration (by weight) may be used, though it is preferred to use from about 0.01 to about 5 percent concentration (by weight), and it is even more preferred to use from about 0.1 to about 3 percent concentration (by weight).
• the temperature of said solution may be from about 0° to about 100° centigrade, though it is preferred that said temperature be from about 20° to about 70° centigrade, and it is even more preferred that said solution be at ambient temperature.
• the compounds of this invention are preferably used as additives in sulfite baths for the electrodeposition of gold and gold alloys. They can comprise one or more phosphorus atoms and the acid functions thereof can be free, esterified partially or completely. It has been found that in many cases the esters are as active or more active than the corresponding free acids when added to gold baths and this observation is very surprising and completely unexpected. Indeed, if, as it is generally supposed, the activity of the free acid additives is due to the affinity between the acid OH functions and the metal ions dissolved in the bath, it is difficult to understand how the ester functions which should be relatively inert can even be more active. It should also be noted that the carbonyl derivatives of the present organo-phosphorus compounds are particularly active.
• the effective quantities of the compounds useful according to the invention can vary between wide limits. These quantities depend, naturally, on the chemical structure of the phosphorus compound considered, that is on the nature and the number of the functional groups and, presumably, on their orientation. In some cases, a few mg/l, e.g. 1 to 2 mg/l are sufficient; in other cases higher concentrations, e.g., of the order of 10 to 100 g/l or even up to the limit of solubility in the bath can be desirable and advantageous.
• One or more of the novel compounds of this invention may be applied to textile materials by conventional finishing techniques such as by thermal induced pad curing so as to incorporate into the textile a flame retardant amount thereof.
• the compounds of this invention have advantages over the flame retardant agents of the prior art in that they may be used on a variety of textile materials of different chemical composition, and they may be applied by a variety of methods. They may be applied to materials in either the fiber or fabric form to give flame retarding materials with minimum detectable physical changes in the quality or hand of the textile material.
• Products of this invention may be applied to cellulosic materials in several ways to give a durable flame retardant treatment.
• Aqueous mixtures of the products with formaldehyde, urea, trimethylol melamine or other known cellulose crosslinking agents may be applied to cellulose substrates with or without the aid of an acidic catalyst by a padding process.
• the cellulosic material may be immersed in an aqueous solution of the compounds, trimethylol melamine, and Zn(NO 3 ) 2 .6H 2 O and squeezed on a two roll padder to 70-90% wet weight pick-up.
• the material is dried at 220°-270° for 1-3 minutes and cured at 300°-370° F for 1-6 minutes in a circulating air oven.
• the samples are then washed in hot water and dried.
• the finished samples have a flame retardant add-on of about 5 to about 40% and preferably about 10 to about 25% by weight.
• the flame retardant agents of this invention may be applied to various textiles such as cellulosic materials, proteinaceous materials and blends of cellulosic or proteinaceous materials with analogous man-made fibers.
• cellulosic materials applicant intends to embrace cotton, rayon, paper, regenerated cellulose and cellulose derivatives which retain a cellulose backbone of at least one hydroxy substituent per repeating glucose unit.
• proteinaceous material applicant intends to embrace those textile materials comprising the functional groups of proteins such as the various animal wools, hairs and furs.
• the flame retardant compounds or additives of the invention may be incorporated into resin compositions by known methods. That is, to say, the flame retardant additive may be added to the resin by milling the resin and the additive on, for example, a two-roll mill, or in a Banbury mixer, etc., or it may be added by molding or extruding the additive and resin simultaneously, or by merely blending it with the resin in powder form and thereafter forming the desired article. Additionally, the flame retardant may be added during the resin manufacture, i.e., during the polymerization procedure by which the resin is made, provided the catalysts, etc., and other ingredients of the polymerization system are inert thereto. Generally, the compounds of this invention may be incorporated into the thermoplastic resin in flame-retarding amounts.
• ASTM Test D2863-70 used in accordance with the following examples, generally provides for the comparison of relative flammability of self-supporting plastics by measuring the minimum concentration of oxygen in a slowly rising mixture of oxygen and nitrogen that will support combustion.
• the procedure encompasses supporting cylindrical test specimens 70-200 ⁇ 8.0 mm. vertically in a glass tube fitted with controlled upward oxygen/nitrogen gas flow. The top of the specimen is ignited and oxygen flow is adjusted until it reaches that minimum rate at which the specimen is extinguished before burning 3 minutes or 50 mm. whichever happens first.
• the oxygen index(n) is then calculated as follows:
• 0 2 is the volumetric flow of oxygen, at the minimal rate and N 2 is the corresponding volumetric flow rate of nitrogen.
• AATCC test method 34-1969 The Vertical Char Test, used in accordance with the following examples, generally provides for the comparison of relative flammability of 2 3/4 inch ⁇ 10 inch fabric test specimens when exposed to a controlled burner flame, under controlled conditions, for periods of 12.0 and 3.0 seconds. Charred specimens are thereafter subjected to controlled tearing tests, using tabulated weights, to determine the average tear length as representing the char length of the fabric. In addition, samples which are wholly consumed by the flame are rated (B) and samples which do not burn are rated (NB). For comparison purposes, it should be noted that untreated samples of the fabrics used in the examples of this case would be consumed by this test.
• Example 5 Using the reactants and procedure as described in Example 5, a 16-hour heating at 60° C gave a 50% hydrolysis product. The product was isolated and purified as described in Example 1. NMR and infrared spectroscopy were used in structure determination. Product containing 2-3 molecular units of water was obtained in 86% yield.
• 0.5 molar FeCl 3 solution was titrated drop-wise into 50 grams of a stirred solution of a given pH containing 0.5 gram of sequestrant. Titration was continued along with simultaneous pH adjustment until a perceptible, permanent haze existed in the solution (end point). The observation of haze is facilitated by passing a light beam through the solution.
• Sequestering ability in terms of number of pounds of Fe 3 + sequestered per 100 pounds of sequestering agent was calculated by multiplying the sequestering efficiency (S.E.) by a factor of 7.1.
• a 0.5 molar CuCl 2 solution was titrated drop-wise into 100 grams of a stirred solution at a given pH containing 50 milligrams of potential sequestrant (0.05%). Titration was continued with pH adjustment, until a perceptible, permanent haze prevailed in solution.
• Sequestering ability in number of pounds of Cu 2 + sequestered per 100 pounds of sequestering agent was calculated by multiplying the sequestering efficiency (S.E.) by a factor of 22.0.
• a 0.05 molar CaCl 2 solution was titrated drop-wise into 100 grams of a stirred solution at a given pH containing 50 milligrams of sequestrant (0.05%), along with 100 milligrams of sodium carbonate (0.1%) to act as an end-point detector. Titration, with pH adjustment, was continued until a perceptible, permanent haze existed in solution.
• Sequestering ability in number of pounds of Ca 2 + sequestered per 100 pounds of sequestering agent was calculated by multiplying the sequestering efficiency (S.E.) by a factor of 10.1.
• a padding solution was prepared containing 50 parts of 1,3-bis(dihydrophosphonomethyl) urea, 49.5 parts water, and 0.5 part Triton X-100 wetting agent.
• the treated sheeting was subjected to 10 home washes with 50 gr. of Tide and 1/2 cup of Calgon water softener in each.
• the thus washed, treated sheeting had a char length of 11/4 inches when subjected to the AATCC Test 34-1969 and an oxygen index of 32 when subjected to the oxygen index test.
• Example 10 5.0 oz. per sq. yard cotton sheeting was padded through the solution and squeezed to about 90% wet pick-up on the two roll laboratory padder. After drying at about 200° F for about 2.5 minutes and curing at about 360° F for about 2 minutes, the treated sheeting was scoured and dried as described in Example 10, showing a 14.7% weight add-on after drying. When tested by the AATCC Test 34-1969 method, the char length was 1.75 inches. The oxygen index of the treated sheeting was 32.
• Example 10 5.0 oz. per sq. yard cotton sheeting was padded through the solution and showed a wet pick-up of about 92.0% after being squeezed through the two-roll laboratory padder at 60 lbs./in 2 gauge pressure.
• the wet padded sheeting was dried at about 200° F for about 2.5 minutes, cured at 360° F for about 3 minutes, scoured and dried as described in Example 10.
• the thus treated sheeting showed a weight add-on of about 13.8%, a char length of 2.25 inches when tested by the AATCC Test 34-1969 method, and an oxygen index of 32.

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• 1974
  • 1974-01-07 US US05/431,194 patent/US3992294A/en not_active Expired - Lifetime
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• 1975
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